Astronomy and Astrophysics – Astrophysics – General Relativity and Quantum Cosmology
Scientific paper
2010-05-03
Phys.Rev.D82:042002,2010
Astronomy and Astrophysics
Astrophysics
General Relativity and Quantum Cosmology
14 pages, 5 figures (matching Phys.Rev.D version)
Scientific paper
10.1103/PhysRevD.82.042002
Continuous gravitational-wave (CW) signals such as emitted by spinning neutron stars are an important target class for current detectors. However, the enormous computational demand prohibits fully coherent broadband all-sky searches for prior unknown CW sources over wide ranges of parameter space and for yearlong observation times. More efficient hierarchical "semicoherent" search strategies divide the data into segments much shorter than one year, which are analyzed coherently; then detection statistics from different segments are combined incoherently. To optimally perform the incoherent combination, understanding of the underlying parameter-space structure is requisite. This problem is addressed here by using new coordinates on the parameter space, which yield the first analytical parameter-space metric for the incoherent combination step. This semicoherent metric applies to broadband all-sky surveys (also embedding directed searches at fixed sky position) for isolated CW sources. Furthermore, the additional metric resolution attained through the combination of segments is studied. From the search parameters (sky position, frequency, and frequency derivatives), solely the metric resolution in the frequency derivatives is found to significantly increase with the number of segments.
No associations
LandOfFree
Parameter-space metric of semicoherent searches for continuous gravitational waves does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Parameter-space metric of semicoherent searches for continuous gravitational waves, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Parameter-space metric of semicoherent searches for continuous gravitational waves will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-530769